Sample CRS-325-a

NavDat sample number 7378 · RHYOLITE

Sample

Sample ID	CRS-325-a
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	47.013
Longitude	-121.72
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		17	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	76.22		WT%	XRF
TIO2	0.4		WT%	XRF
AL2O3	12.07		WT%	XRF
FEOT	2.29		WT%	XRF
MNO	0.02		WT%	XRF
MGO	0.16		WT%	XRF
CAO	1.02		WT%	XRF
NA2O	3.06		WT%	XRF
K2O	4.74		WT%	XRF
P2O5	0.03		WT%	XRF
TOTAL	99.42		WT%	XRF
LOI	4.8		WT%	XRF

References

Fischer, Joseph Fred (1970) The geology of the White River-Carbon Ridge area, Cedar Lake Quadrangle, Cascade Mountains, Washington.